Dr. Kwan's hypothesizes that allowing factory employees to listen to music while working will improve productivity. After conducting the experiment, Dr. Kwan finds that the group of participants who were allowed to listen to music was more productive than the group who did not, but this difference was not statistically significant. What should Dr. Kwan conclude about the difference between the two groups?
A) It supports his hypothesis.
B) He is likely to find the same effect if he replicated the study.
C) There is an unacceptable chance that the difference is due to random chance.
D) The experiment was biased.

Question

Quizplus · Accepted Answer

The lack of statistical significance indicates that there is an unacceptable chance that the difference between the two groups is due to random chance. Therefore, Dr. Kwan cannot conclude that the results support his hypothesis or that he would find the same effect if he replicated the study. It does not necessarily mean that the experiment was biased, but rather that the sample size or methodology may need to be adjusted for future studies to increase the chances of finding a significant difference.

Dr Kwan's Hypothesizes That Allowing Factory Employees to Listen to Music